remove er query for 1248757

this query will always match failures on anything that uses ssh on a
node, because it's in the logs. It's matching on completely innocuous
dropbear content. It's the equivalent of message:"Fail"

We need to remove this and dive into the bugs in particular that are
here.

Related-Bug: #1248757

Change-Id: I71349140e19576625642ce855bc9917a1ac19b93
Merge "remove er query for 1248757"